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    Surface structure of sodium chloride solution

    Access Status
    Fulltext not available
    Authors
    Nguyen, C.
    Phan, Chi
    Nakahara, H.
    Shibata, O.
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Nguyen, C. and Phan, C. and Nakahara, H. and Shibata, O. 2017. Surface structure of sodium chloride solution. Journal of Molecular Liquids. 248: pp. 1039-1043.
    Source Title
    Journal of Molecular Liquids
    DOI
    10.1016/j.molliq.2017.10.138
    ISSN
    0167-7322
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/61307
    Collection
    • Curtin Research Publications
    Abstract

    The arrangement of Na + /Cl - near the water surface was studied by simulation. The simulating result was combined with experimental surface charge to describe ionic arrangement. It was found that the interface is positively charged due to the interaction between ions and water surface molecules. The charge increased with increasing concentration. The simulations were validated with experimental measurement. The positive charge at the surface is balanced by the distribution on the diffuse zone, which is governed by the well-established Poisson-Boltzmann formulation. The “diffuse plane” was quantitatively verified by the water dipole distribution in molecular simulation. The results provide a consistent image of ionic distribution around the interfacial zone. In addition to NaCl solutions, the result also provides important basis to study other electrolyte surface.

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